Saying G-ds name in various shorter prayers

Do we say Shem Hashem in things like womans prayer after candle lighting, tefillas HaShelah etc? Or maybe we simply say ,,Hashem"? Thank you

Shalom!

Thank you for your question!

God’s name is holy and one is not to use it, for example, in routine conversation, one is permitted to use God’s name in study, prayer, and even when teaching people how to pray.

As such, when referring to God in conversation one is to use the word “Hashem.” However, when reciting any of the traditional prayers, one may use the true name of "Adon-ai." One may even teach young children to pray and use God’s true name when doing so.

Nevertheless, when teaching someone to pray, whether adult or child, it is best if they say “Adon-ai” on their own. Perhaps one can tell them that when you pause, it is the sign that they should say “Adon-ai.” One can also merely say “Ado” and the person one is teaching will know that it is time to say “Adon-ai.” But again, as mentioned, one can explicitly say the entire Name, if needed, to teach people how to pray.

It is a matter of dispute whether one should say “Adon-ai” when coming across God’s name in the course of study or if one should say “Hashem.” This is relevant when studying Talmud, for example, where one comes across verses from scripture that contain God’s name.

Most authorities rule that it is permissible to say God’s true name in the course of study if one mentions at least half the verse. As mentioned, one is permitted to pronounce God’s name in the course of prayers, and this includes, for example, the Shabbat zemirot (songs) where God’s name is included.

OC 215 and commentaries